Google (sadly, always) is likely suited to this, as it's devices check 
in almost constantly where you're at depending on the mode.  Both app's 
can get this locally, or their app services follow you as well with api 
access.  I have google glasses I've been doing some debugging, and they 
check in probably at least every 5 min, and I'd assume the phones do as 
well.  Never really realized this before, but seems the best way to 
track anyone.  Good enough for the government...

That would be an endpoint, talking some kind of rest or js-ish protocol 
with google, probably with an amqp backend of some flavor tracking the 
tasks in a|many state machine for this and other services you might 
notify into, tracking responses or other metrics.


On 07/30/2014 09:25 AM, David Schwartz wrote:
> Thanks, but what I'm really looking for is insights around the data 
> transport, although I do understand what you're saying about using a 
> third-party service like Twitter. Perhaps there are services already 
> designed for such stuff?